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将巷道围岩视为多孔介质,考虑地下水渗流作用的影响,应用弹塑性理论,分析了非均匀应力场圆形巷道围岩的力学性态,推导出了非均匀应力场下圆形巷道弹塑性的解析解,基于Mo-hr-Coulumb强度准则,得出了渗流作用下巷道围岩的塑性区边界线方程,并通过具体实例,对比分析了当λ=0.5时渗流作用对应力场的径向应力与切向应力在巷道两帮和顶底板的分布情况。研究表明,考虑渗流作用,对应力场的影响作用更为显著。
Considering the influence of groundwater seepage, the surrounding rock of the roadway is considered as a porous medium. The mechanical behavior of the surrounding rock in a round tunnel with inhomogeneous stress field is analyzed by using the elasto-plastic theory. The elastic-plasticity of the circular roadway under inhomogeneous stress field is deduced. Based on the Mo-hr-Coulumb strength criterion, the plastic zone boundary line equation of surrounding rock under seepage is obtained. Through the concrete example, the radial direction of the stress field when λ = 0.5 is compared and analyzed. Stress and tangential stress in the roadway two gang and the top floor distribution. The research shows that considering the seepage effect, the effect of stress field is more significant.